Electrically-controlled elevator.



No. 851,682. PATENTBD APR. so, 1907. w. n. LUTZ.

ELEOTRIGALLY CONTROLLED ELEVATOR.

' arrmommn FILED mm; 22, 1905.

3 SHEETS-SHEET 1.

I v k N WITNESSES: INVENTOR ATTORNEY No. 851,682. PATENTED APR. 30, 1907.

' w. 1). LUTZ.

ELEOTRIGALLY CONTROLLED ELEVATOR.

APPLIOATION rmm JUNE 22, 1905.

' s sums-sum 2.

RAW

WITNESSES:

PATENTED APR. 80, 1907.

W. D. LUTZ.

ELECTRIGALLY CONTROLLED ELEVATOR.

APPLICATION FILED JUNE 22, 1905.

3 SHEETS-SHEET 3.

%%M fi ATTORNEY N E S S E N n W .um'rnn srn'rns manna onnnon.

ELECTRI CALLYCO NTROLLED ELEVATOR- Specification of Letters Patent.

Patented. April 30, 1907.

Application filed lune 22, 1905. Serial No. 266,397.

To all whom it rac ng concern.- A

Be it known that I, WILLIAM D; LU'rz, a

I citizen of the United States, and a resident of Allendale, inthe county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Electrically Controlled Elevators, of which the following is a elevation of an elevator mechanism .and cerspecification.

My invention relates to automatic elevators and especially to that class of electric elevators which are automaticin their operation and are especially adaptable for use in private houses.

the use of the usual switches of ush buttons in the hallways and which be entirely automatic and safe in its operation.

To these ends I have provided certain novel arrangements and combinations of parts which will be described in the follow- :1ng specification and the novel features thereof pointed out in claims:

Referring to' the drawings, Figure 1 is an I tain connected parts which I use in carrying A out my invention.

Fig. 2 is a sectional view of a special door lock and this figure shows certain arts of the lock which are mounted If on a cor and other parts which are mounte upon a'door j amb or casing. Fig. 3 is a side elevation, partlv in section, of the arts shown in Fig. 2. igs. 4 and 5 are etail' views of certain parts which are within the door lock and are used in conjunction with the lock mechanism. Fig. 6 is adiagram of a preferred system of wiring for an electric elevator which embodies my invention. Fig. 7 is an elevation of the floor controller; Fig.

8' shows a referred form' of a detail of the floor contro er. x -L1ke characters of reference designatecorresponding parts in all of the drawings.

' ofacable 11. p prises amotor 13' and a windin 10 designates an elevator car which is connected to a hoisting mechanism 12 by means The hoisting mechanism comdrum 14 which may be connected together y suitable gearing within a casing 15. This mechan- .1sm may also be provlded with a brake 16.- A floor-controller 17 is shown {mounted upon the motor and this is connected to the shaft of; the winding drhm 14by achain-or belt 18.

19, 19, '19 designate doors in the hatchway latch 32.

which lead to the elevator. car, and are provided with my improved door latch.

20 designates a controller which comrises certain switches and other' ap aratus or the control of the motor which w1 be described hereinafter.

g designates my improved door lock with its coacti-ng parts. -Referring now to Figs. 2 and 3,1 will describe the various parts of this lock. 31, 31 designate its knobs or handles. They are attached to a shaft or spindle 31A to which a cam.31Bis'als'o at tached. This camis so placed in relation vto a latch 32 that the latter may be raised whenever the cam is turned to one side or the other. The latch 32 is shown as carried by a latch frame 32A which may be pivoted at 3213, and the cam 31B may engage with this frame to lift the latch. The latch is slidably mounted in the frame.32A and is provided its'outward position, as shown in the draw ings. The outwardmovement'of the latch is adjustably limited by' nuts 32D on the in ner end of the latch. .The outer end of the latch is beveled, as shown, and carries a con-- tact late 32F which is attached to but insulate from the rest of the latch. A stri of insulating material is shown at 32E. .33 es-' ignates a lever which isv arranged to be 0per-;

with a spring 320 which normally keeps it'in ated b a key. When a key is insertedin the 10c and 1s turned to the rightit causes the lever 33 to'engage with a pin or projec tion 33B on the latch 32 andto thereby move the latch back against the action of the s ring 32C until it releases the door. The atch may also be moved from the car by means of a handle 330 on the inside of the door. The parts of the door lock so far described are referably mounted on or within the door itse f. The other arts of the lock may be mounted on or wit the'door jamb or casing. They comprise a number of parts, one i of which isa locking roller 34 which is carried I on one of the ends of the bell-cranklever 34A 'whichlever'is ivoted at34B. To the other end'of this be l-crank lever a spring 34D is attached which tends to hold the parts in the osition shown with the shorter end of the ell-crank lever resting againsta stop 34E and with the locking roller moved outward into the position shown, where it is behind the A swinging locking plate 35 which is pivoted at 35A is held against the shorter en of the bell-crank leverby a spring 3513.

what more in detail in Fig. 4. an arm 37A'pivoted at 3713 in a stand 37C.

This locking plate made of magnetic material and is arranged to be moved back out of engagement with the bell-crank lever by means of an electromagnet 35.

Above the latch 32, a circuit closer 37is placed. This is shown in Fig. 2 and some- It comprises 37]) are stationaryelectrical contacts supported on, but insulated from a bracket 37E. There are preferably four of these contacts, to each of which a conductor may be connected. One end of the arm 37A is directly above the latch 32'and is arranged to be engaged by the latch when the latter is raised, and the the latch is raised the contacts just pointed out will be connected together. Two other electrical contacts 38A and 38B are also shown in the drawings in Figs. 2 and 5. These are insulated from the rest of the lock and from each other as shown at 386. They are so placed that when the latch 32 is in locking position, its metallic face 32F will engage 'with and electrically connect the two' contacts 38A and 383. It is important that the relative .position 'of the parts just de scribed shall be such that the face of the latch shall not touch these two contacts until the latch is behind the locking roller 84 and the stationarydocking plate 39 which I will now point out. 1 This locking plate 39 is situated below and maybe slightly in advance of the locking roller 34 and is for the purposeof engaging with the latch 32, when the latter is in the position shown in Fig. 3; to hold the door securely from opening. Its position is shown in Fig. 2 and is also shown bydotted lines in A spring 36A may be pro- Vided to start the dooi iopenwhenit is-un locked. I

Before proceeding with the description of the rest of. the apparatus andthe electrical circuits,.l will describe the operation of the vdo'or lock. I

' When the parts are in the position shown,

the lock serves the purpose of securing, the door in its closed position. N w when a person turns one of the knobs 31 and thereby raises the latch 32,'the latteris raisedout of pngagementwith the locking plate 3.9 but the door, still remains locked because thelatch 32' will be behind the locking roller This loch'ng roller is held from movement in either direction by the stop 34E and, bygthe w g g lockin plate 35. If, tow g li ht lines. of

sadness knob 31 will cause the latch' to push, the lock I ing roller back out of its way as the roller will then befree to swing about the pivot 34B.

When the latch is raised it will cause the bridge pieces 37F to bemoved down onto contacts 37]) as I have already shown, and

when the door is opened the contact face32F of the latch 32 will breakthe contact it has made between the stationary contacts 38A and 38B. The stationary locking plate 39 may be so arranged that when a person lifts the latch up out of enagement'with'itand thereby causes the contacts 37]) to be connected, that the upper edge of the plate 39 will support the latch in this raised position and itwill then remain in that position until the'door is either opened or pushed shut-a, w F'gil shows what I have called a floor controller 17 mounted upon the top of the motor .13. A side elevation of this floor controller is shown in Fig. 7. stand-17A which supports the various parts of the mechanism. A shaft 17B rigidly supports a series of arms 170, the outer ends of which carry antii'riction rollers 17D. shaft is arranged tob'e rotated bysome mov It comprises a .95 This ing part of the hoisting mechanism'as for eX- ampleby having a chain-wheel 17E connected with the shaft of the winding-drum 14 by a'chain 18. ing the arms 17C to have a movement pro- This is for the purpose of caus- V I portional to that of" the elevator car 10.

Another shaft 17F carries a series of contact arms 17G, 17G, loosely mounted upon it.- These arearranged tomake contact with" and electrically connect in pairs either one of twoseries of stationary insulalt'ed contacts. The upperseries of these contacts ,'are designated by 40 on one side and by Al on the opposite side, While the" two lower series of these contacts are designated by 42 ;and 48. The innerends 17H of the contact arms 17G, 17G are cam-shaped and are soar L ranged that the contact arms are moved into engagement with eitherthe upper or lower series of stationary contacts on their respec tive sides by the arms 17 C. Thefurther opn ection. with the description of the electrical circuits which it is adapted to'control.

eration of this device will appeanlater in con- 5 Referring'nowto Fig; 6, T will trace the y I various circuits there shown and at the same time describe the operation ofthe apparatus and the automatic elevator system which I have in vented. V The main circuitsare shown the'figure designated by and -.They

by heavy lines while all the auxiliary controlling and operating circuits are shown by The mains are shown at the top is connected to a contact-50C. Contacts 50D switch 50. The plus main isconnected to contacts 50A.and 50B, and the minus main and 50E are'connected together. The contacts 500-, 50D and 50E are mounted upon but insulated from a movable support designated bydotted lines and are arranged to be moved together eitheragainst contacts 50G, 50F and 50A or against contacts 501, 50H and 5013, respectively. This may be done by energizing either the electromagnet' 50J or the electromagnet 50K. The motor armature is designated by 13A. One of its brushes is connected with contacts 50H and 50G and its other brush is connected with contacts 501 and 50F. One side of the shunt field 13B of the motor and the winding 16A of the brake is connected to contacts 50D and 50E and their other side is connected to the minus main. N ow when the reversing switch is moved to one side or the other, it is evident that'anelectric current will pass through the motor armature in one direction or the other, and that a current will also pass through the shunt 'field and the magnet winding and this will cause the motor to rotate in one direction or the other and through its connected mechanism to drive the elevator car up or down. The car will continue to run in the same direction until the movable contacts of the. reversing switch. are again brought back to central position. which willcut off the Ourrent supply from the motor and brake and cause the car to stop. I will now trace the controlling circuits and show how the motor and car may be automaticallystarted and stopped. A conductor 60. is connected to the main near contact B and runs from there through a slack-cable switch 61 (which is w'ell known in the art and therefore will not 'bedes'cribed here) to the contact 38B in door on the p safety stop button 64.and thence by a conthe first door lock. If this is now connected with its companion contact 38A by the me tallic face 32F on the latch 32 the circuit will he continued through this lock to the next one and so on throu h the whole series of locks. 'Thiscan only iappen when all oi the hatchway doors are closed and locked. 'Aft er this part of the circuit has passed through all of the looks it branches and one partpf'it, 62 goes to the car. It there runs throu h a gate contact 63 which is arranged to Tie closed. only when the gate or elevator car is closed, thr'ougl'i a ductor A .to one terminal of a doublewound non-interference relay 70. The circuit then extends through both of the wind- .ings of relay and by aconductor B -i'- to a series of push-buttons on the car and to one of the contacts 37D in each of the door locks.

Thewindings on relay 7 O are opposed-to each. a other so that a current passing through one of them will neutralizethe effect of a current passing throu 'h the other, but a current passing through either ofthem alone will energize the magnet of the relay and cause it to open its contacts. Another conductor C runs from a point between the two windings of relay 70, to movable contacts on floor relays 1A, 2A and 3A. i

If an operator in the car presses one of the buttons in the car, let us for example say the middle one, he will thereby close a circuit through the conductors just described and through conductor 2 to the winding 2A of a floor-relay, through this floor-relay winding to one of the series of stationary contacts 40 and also to one of the series of stationary contacts 41 on the floor controller, through I an adjacent contact on the .floor controller,-

and thence through either conductor U or D i to magnet 50J or 50K, through conductor 4, winding of a relay 72; to the negative orline. This v will cause 'the reversing switch to be closed on one side or the'other in the manner before described and cause the car to travel up or down. I v

I will now show why the, circuit will be closed through either U or D through the contacts at 43B. Contacts at 40A and 40B will be closed and contacts at 42Aand 42B- will be open. These operations are so adjusted that the contacts for a given floor are opened and closed asthe car reaches that;

floor. The contact arms 17G, 17G are thus actuated by the movement-of the car. In 'order that they cannot be moved by hand .and thus tampered with I prefer to extend their cam faces 17H, 17H around the path of movement of the roller 17D as shown in Fig. 8. In this case if roller. has been moyed to the right by the movement of the car the I have shown in arm 17G will be moved down thereby and l L locked in the position designated by dotted lirites'until 17D is moved'back again to the Referring again toFig. 6 it will be seen that when the car is above the'second floor the only ath for the conductor from floor. relay 2Aw1 50K through conductor D. This will close the reversing switch 50in such a way as to 1 be through contacts at 40B to magnet cause the car to run down until it reaches the second floor,-w'hen contacts at 4013 will be 0 ened and contacts at 4213 will'be closed.

T is will open the reversing switch, and stop thecar..

As the current which passes through the reversing switch magnet passes also through to the car push buttons and to contacts 37D in the door locks. be energized and will break a contact at 7 2B The magnet 72 will also which will cut off the sup ly through conductor 72A to the series 0 contacts 42 and .43 on the floor controller and to the door lock magnets 36 on all of the floors.

After one of the hatchway doors or the elevator car gate has been opened, the circuits will be inoperative. until the door or gate has been closed and locked again because the supply through conductor 60+ will be broken between one pair of the door contacts 38A, 38B. If only the gate contact 63 is opened this will not interfere with the operation of the lock. This part of the operation from the car is similar to that of a well known system of control for automatic electric elevators. In the same way as above described the other buttons in the car may be pushed to send current through conduc tors 1 or 3 and floor-relays 1A or 3A tocause the car to move to a corresponding floor.

The contacts 37D in each of the door locks are arranged to be connected by a contact plate 37 F, and the parts just mentioned form a circuit closer which is in the controlling circuits in such a way that when one of them is actuated to close its circuit it will cause the car to come to the floor at which it is situated. Let us for example consider that a person turns the latch at the second or middle floor. If the car is at that "floor, the door-lock magnet will be energized thereby, but'if it is not at that floor, a circuit will be established through conductor 2, floor relay 2A, floor controller'contacts at 41A or 4213, through the U or the D wire to and through magnets 503017-5011 and through magnet 72 to the line. This will cause the reversing switch to close and the car to move until it reaches the particular fioorjat which the look was moved when it will be stopped automatically by the action of the floor controller 17,. Thus the" contacts 37D and contact plate 37F perform the function of push buttons in some of the systems'now in use. It is only necessary; however, according to my invention; for a person to try the. door lock, to cause the car to come to the'floor where the lock wa's tried. Ihave before stated that the locking plate 39. may be so placed in relation 'tothe locking roller 34 and the latch 32, that it may hold the latch up in its raised position 6 5 after it has been raised by a person outside the door. This of course would maintain the contacts 37D closed and therefore maintain the current in the circuit through the reversing switch until the car comes to that floor, and thereby interrupts the circuit at the floor controller. The floor relays 1A, 2A and 3A are for the purpose of maintaining 'such current when push buttons are used and therefore are not necessary when the locking plate is arrangedto do the same-thing.

At the same time contacts 37D are closed, contacts 37D are also closed. These are in the circuit of the locking magnets 36 and this circuit extends from each locking magnet through conductors 1D, 2D and 3D to the contacts in series 42 and 43 on the floor controller. These back contacts on the floor controller will only be closed when the car is at. their corresponding floor. Now to show the operation of these locking magnet circuits 1 will trace one of them in detail. One of the contacts 37D at each floor is connected with the main by conductor 63 Now if contact plate 37F at the second floor, for example, is moved against its contacts 37 D, a circuit may thereby be established through conductor 2D, floor controller contacts at 43A and at 42B, through the arm 72A and contact at 72B to themain. In order to es tablish such a circuit both the floor controller contacts at 43A and at 42B must be closed and the contact at 72B must be closed. This means that the car must be at the second fioor and that the reversing switch 50 must be open so that the-car is sto ped. if these conditions are present the loc ring magnet 36 at the second hocr will be energized and the door may be opened. The operation is similar for the other floors, only the circuit will be closed through conductors 1D and contacts at 42A forthe first floor, or 3Dfand contacts at 433 for the third floor. If the car is not present at a given floor when the latch is moved to close the contacts of the door-lock magnet circuit, the closing of these contacts will not complete the circuit but will only close the gap in the circuit which will still be open at the floor controller. A movement of the car to the desired floor will cause the floor controller. to be actuated to complete the door-lock magnet circuit and to thereby release the door. The object of magnet 72 will now be aparent, for this magnet is energized and reaks the door lock circuit at 72B whenever the reversing switch is closed. This makes it way doors while the car is running and therefore prevents one opening a door while the impossible for one to unlock any of thehatchcar is passing. Instead of a magnet 72-'for this purpose, contacts may be pi'sovided on purpose.

the reversing'switch'itself for The separate magnet is a preferred construction. as it is readily applied to installations already in use;

' In elevators of this class it is customary .to add many refinementssuch as automatic accelerating devices, series fields for the mo tors, automatic limit stops and many others. These are no part of the present invention and therefore I have omitted them from the drawings and description and have shown only such parts as are necessary to describe and illustrate the use of my invention.

I believe many features of this invention are broadly new and that therefore my invention should not be limited to the specific devices shown and described as illustrative of w the invention. v

If one of the latches 32 is held up by its locking plate 39 until the car comes to its floor, the doorwill be immediately pushed, open by spring 36A and will break the operat- 1ng circuit between contacts 38A and 38B,

.Who has first called it;

and thus prevent any one at some other floor from calling the car away from the person This invention is applicable to any form of elevator-which is electrically controlledand is not necessarily confined to electric eleva- -WhatIcla im is: i. 1. The combination with an electricall controlled elevator, a door lock, and means for starting-the elevator upon a movement of a portion of said lock. i

2. The combination of an electrically con'-, trolled elevator, a controlling circuit-there-, for, and a door lock having contacts in the controlling circuitto arrange to cause the elevator to be started when said contacts areclosed. 1

3. The cornbinationof an electrically controlledelevator, a controlling circuit there- I i for; and a door lock having contacts in the the lock.

controlling circuit 'so arranged that they will start the car upon movement of a portion of 4. Inan electrically controlled elevator,

I the combination of controlling circuits, a car,

a hatchway in which the car runs, a door in v the hatchway,"a lock on said door, and con.-

tacts in the lock connected to thecontrolling circuits and arranged to cause the elevator; to

" bestarted when said contacts" are closed 5. In anelectrically controlled elevator, the combination of controlling c rcuits ,a car, a hatchway in which the car runs, a door in the hatchway a lock on said door, and contacts inthe lock connected to the controlling circuits and arranged 'to vcause the can to move to said door upona movement of a portion of said lock. 6. In an electrically controlled elevator; the combination of controlling circuits, a car, ahatchway in which-the car runs,-a door in in the the hatchway, a lock on said door, and con I tacts in the lock connected to the-controlling I circuits, some of which are arranged to cause the car to move to said door and others of which are arranged to render the controlling circuits inoperative.

7. In an electrically controlled elevator, the'combination of controlling circuits, a car, a hatchway in which the car runs, a door in the hatchway, a lock on said door, contacts in the lock connected in the controlling circuits some-of which are arranged to'cause the car to move to the door when a portion of the lock is moved, and others of which are ar ranged to render the controlling circuits inoperative when the door is opened;

8. In an electrically controlled elevator,

the combination of controlling circuits, a car,

a hatchway in which the car runs, a plurality of doors in the hatchway, a lock on each door, contacts in the locks connected in the controlling circuits which are arranged to cause the car to move to any given door when a portion of its lock is moved.

9. In an electrically controlled elevator, the combination of controlling circuits, a car,

'a-hatchway in which the car runs, a plurality of doors in the 'hatchway, a lock on each door, contacts in the locks connected in the controlling circuits some of which are arranged to cause the car to move to any given door when a, portion of its lock is moved and others of which are arranged to render the i I controlling circuits inoperative when any door is opened. i

10. The combination of an electrically controlled elevator, a car, a door lock, means for starting the elevator upon a movement of a portion of the lock, and means dependent uponthe position of the car for releasing the lock.

trolled elevator, a controlling circuit there- 'for, a car, a door lock having contacts in the controlling circuit for controlling the elevator, and electrical means dependent upon the position of the car'for releasing the door lock.

12. In an electrically controlled elevator,

i 11. The comblnation of an electrlcally con- Iro the combination of controlling circuits, a car, 4

a hatchway in which the car runs, a door in the hatchway, a lock on said door, contacts in said lock connected to the controlling circuits arranged 'tocause the car to move to said door upon a movement of a portion of the lock, and electrical means for releasing the look when the car has reached the door, 13-. In an electricallycohtrolled elevator, the combination of controlling circuits, a car,

a hatchway in which the car runs, a door in the hatchway, a lock on said door, contacts looksome of :WhiCll are arranged to cause ofcwhich are arranged to render the controlthe car to Inbve to the door and others i ling circuits inoperative, and electrical means for releasing the lock when the car has stopped opposite the door. v

- 14. in an electrically controlled elevator, the combination of controlling circuits, a car, a hatchway in which the car runs, a plurality of doors in the hatchway, a lock on each door, contacts in the locks connected in the 'controlling circuits which are arranged to cause the car to move to any given door when a portion of it's lockis moved, and electrical means for releasing the look when the car has stopped oppositethe given door.

15. ln an electrically controlled elevator, the combination of controlling circuits, a car, a hatchway in which the car runs, a plurality oi doors in the hatchway, ,a lock on each door, contacts in the locks connectedinthe controlling circuits which are arranged to cause the car to move to any given door when C of doors in the hatchway, a lock on each door, a magnet in each lock, contacts in the locks some oi which are in the controlling cir cuits and are arranged to cause the car to 'move to any given door when a portion of its loclr is moved, others of which are incircuit with the magnet, and means 3% energizing said magnet and thereby releasing the loclr when the latter contacts are closed.

17. in an electrically controlled elevator,

the combination of controlling circuits, a

car, ahatchway in-which the car runs, a plurality of doors in the hatchway, a lock on "each door, a magnet in each lock, contacts in i the locks someofwhich are in-the controlling circuits and are'arranged to cause the'car to move to any given door when a portion of its lock is moved, others of which are in circuit with the magnet, means for energizing said lr nagnet andthereby releasingthe lock when the latter contacts are closed when the lock is moved, and means for preventing such energizing of said magnet except when the car has stopped at such given floor.

18, in an electrically controlled elevator,

3 I the combination of controlling circuits, a car,

' a hatchway which the car runs, a plurality of doors in the hatchway, a lock "on each door, a magnet in each lock, contacts in the lock some ofwhich are in the controlling circuits and are arranged to cause the carv to move to any given door when a portion of its lock is moved, others of which are in circuit;

with the magnet, means for energizing said magnet and thereby releasing the look when I i the latter contacts are closed, when the lock is moved, means for preventingsuch ener gizing of said magnet except when the' car has stopped at such given floor, and means;

j A senses i for rendering the controlling circuits and the door lock magnets inoperative when any one of. the doors is opened.

19. in combination with an electrically a double set of contacts, and means actuated controlled elevator, a floor controller having by the movement of the elevator for opening one set of contacts and at the sametime closing the other set of'contacts.

20. in an electrically controlled elevator is- A the combination of a car,"a hatchway v, which the car is adapted to run, an opening in the hatchway at a landing, and a'floor con troller having a double set 'of contacts and means actuated by the movement of the elevator for opening one set 20f contacts and closing the other set ofcontacts, as the car approachesthe opening,-

21. In combination withzan electrically controlled elevator, a car, a' floor controller having two, sets ofcontacts, a contact arm for engaging with one or the other ofsaid sets of contacts, an actuating lever arranged to have a'movement proportional to that of the car and to move the pontact arm from one set of contacts to the other set of confacts when the car reaches a predetermined;

point in its travel.

L2. in combination with an electrically controlled elevator, a car, a floor controller having two sets ofcontacts, a contact arm for engaging with one orthe other of said sets of contacts, an actuating lever arranged to have a movementproportional to that of the car and to move the contact arm from one set of contacts. to the other set of contacts when the car reaches a predetermined point in its travel, and meansfor locking the contact arm in its moved position.

in combination with an elevator, a

car, a hoisting machine, a 'liatchway in which the car runs, a plurality of doors in the hatchway, a lock for each door, and a single iloor controller directly connected with and "actu' ated by the hoisting machine and arranged to control all ofsaid locks.

24. in combination with an elevator, av

car, a hoisting machine, a hatchway in which the car runs, a plurality of doors in the hatchway, a lock for each door,- and a single floor controller directly connected with and actuated by: the hoisting machine and arranged to control all of saidlocks and the movement of the car;

25., in combination with an elevator, a

car, a hoisting machine, a hatchway in which the car runs,-'a plurality of doors in the hatchway, a lock [or each door, a single floor controller directly connected with and acmachme'and arranged,

tuated by the hoistin to controlall of said locks, andmeans for preventing the releasing of the locks when the ,car is passing a door. H

26. in combination With an electrically controlled elevator, a hoisting mechanism, a

car, a hatchway in which the car runs, a plurality of doors in the hatchway, a lock on each door, contacts in the looks, a floor controller connected to the hoisting mechanism, contacts on the floor controller, ci cuits be tween the floor controller and the door lock contacts, and electrical means for releasing 'the door looks when the door lock contacts are closed and the floor controller contacts are closed.

27. In combination with an electrically controlled elevator, a hoisting mechanism, a

car, a hatchway in which the car runs, a plurality of doors in the hatchway, a lock on each door, contacts in the locks, a floor controller connected to the hoisting mechanism,

contacts on the floor controller, circuits between the floor controller and the door lock contacts, and electrical means for releasingthe door locks whenthe door lock contacts are closed and the floor controller contacts are closed and the car is atrest.

28; In combination with an electrically controlled elevator, a car, a hatchway door, [a lock for the door, a floor controller having two sets of contacts one of which sets is arranged to automatically stop the car at the door and the other of which sets is arranged to release the door lock. r

29. In an electrically controlled elevator, the combination of controlling circuits, a car,

a floor controller arranged to have a movement proportional to that of the car, a hatchway in which the car runs, a plurality of doors in the hatchway, a lock on eachdoor,. contacts in the locks connected in the con-- trolling circuits which are arranged to cause the car to move to any given door when a portion of its lock is moved. i

30. In an electrically controlled elevator, the combination of controlling circuits, a car, a floor controller arranged to have a movement proportional to that of the car, a hatchway in which the car runs, a plurality of doors in the hatchway, a lock on each door,

contacts in the lock connected in the controllingcircuits some of which are arranged to cause the car to move to any given door when a portion of its lock is moved and othcar to move to a iven door upon a move-- ment of a portion OI its look, a floor controller and to automatically release the arranged to have a movement proportional to that of the car and to automatically stop the car when it has reached the given door and to automatically release 'the look when the car has stopped at the door.

32. In an electrically controlled elevator, the combination of controlling circuits, a car, a hatchway in which the car runs, a pluralit v of doors in the hatchway, a lock on each door, contacts in the lock connected to the controlling circuits and arranged to cause the car to move to a iven door upon a movement of a portion 0% its lock, a floor controller arranged to have a movement proportional to that of the carand to automatically stop the car when it has reached the iven door look when the car has stopped at, the door, and means situated in the car for controlling its move ment.

33. In an electrically controlled elevator, the combination of controlling circuits, a car, a hatchway in which the car runs, a pluralitv of doors in the hatchway, a lock on eac door, contacts in the lock connected to the controlling circuits and arranged to cause the car to move to a iven door upon a movement of a portion OI its look, a floor controller arranged to have a movement proportional to that of the car and to automatically stop the car when it has reached the given door and to automatically release the lock when the car has sto pd at the door, and other contacts in the oor-locks arranged to render the controlling circuits and the door lock releasing device inoperative when one of the doors is open.

s 34. In an electricallycontrolled elevator,

- the combination of controlling circuits, a car,

a hatchway in which the car runs, a plurality of doors in the hatchway, a lock on each door, a magnet in each lock, contacts in the locks some of which are in the controlling circuits and are arranged to cause the car to move to any iven door when a portion of its lock is movef, others of which are in circuit with the magnet, means for energizing said ma net and thereby releasing the look when the Iatter contacts are closed, and a floor controller arranged to have a movement propor- ,tional to that of the car and to automatically overn the controlling circuits and the door Iock magnets. i y

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM D. LUTZ. Witnesses:

ERNEST W. MARSHALL,

THOMAS FOSTER. 

